Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3770947 A
Publication typeGrant
Publication dateNov 6, 1973
Filing dateAug 20, 1971
Priority dateAug 20, 1971
Publication numberUS 3770947 A, US 3770947A, US-A-3770947, US3770947 A, US3770947A
InventorsD Deily
Original AssigneeCity Nat Bank Of Detroit
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tool control
US 3770947 A
System for control of tool drive with respect to at least X and Y axes to trace a first path segment and to approach a second path segment (e.g., for tool offset, or to trace an inscribed curve tangent to the two path segments), by steps comprising storage of data descriptive of X and Y positions corresponding to current X and Y tool positions and of a first function the value of which is dependent upon the perpendicular distance from the X and Y positions to the second path segment, updating of the stored data upon advance of the drive during the tracing of the first path segment, and interruption of the tracing of the first path segment when the function assumes a predetermined value.
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent 1191 [111 3,770,947 Deily 1451 Nov. 6, 1973 TOOL CONTROL 3,500,150 3/1970 Foster 318 572 [75] Inventor: Don Delly, Lexington, Mass. Primary Examiner Eugene G Botz [73] Assignees: City National Bank of Detroit, Assistant Examiner-Jerry Smith Detroit, Mich.; Robert C. Fisher AttorneyJ0hn N. Williams [22] Filed: Aug. 20, 1971 [57] ABSTRACT [21] PP NO-I 173,408 System for control of tool drive with respect to at least X and Y axes to trace a first path segment and to ap- 52 us. Cl 235/151.11, 235/152, 318/572, P 9"? Path Segment -1 for Offset, of

318/573 to trace an inscribed curve tangent to the two path seg- 5 1] Int. Cl. G06f 15/46 men), by stepsfiomprising g of data descriptive [58] Field of Search 235/151.11, 152; of X and Posmcms 9 Current X and 318561569470, 572 574 Y tool posmons and of a first function the value of which 18 dependent upon the perpendicular distance [56] References Cited frocrln the Xfanhd Y posiitigns to the segond patlt tiegmient, UNITED STATES PATENTS up atmg o t e store ata upon a vance 0 e rive during the tracing of the first path segment, and intergekrFhenmcdcr ruption of the tracing of the first path segment when c 1 3,416,056 12/1968 Motooka et al. 318 573 the funct'on assumes a predetermmed Value 3,423,656 H1969 Tripp 318/570 8 Claims, 23 Drawing Figures j COMPUTER I 5O 22 0 1 7901 m 6O 34 i PM 62 p M 3 W i l 5X 38 l AX 4O 5M w 1 SF 5 i l ADD/SUBTRACT 44 l PAIENTEDMJV 6 ma 3770.947 Y sum 030F 20 v PAIENTEDNM 6 ma v saw one; 20

FIG 6 SHEEI OSUF 20 whm w 7 RPM PATENTEllxnv 5197s 3.770.947 'SHEET [NW 20 PATENTEDuuv 6 I913 sum near 0 I N GE - SHEET 100F2'0 mmv , Mm QwN PATENTEUNUV 5 I973 PAIENIEUuuv ems 3.770.947

sum 120F 20 FIG I4 PATENTEBNUY. sma- 3.770.947

, SHEET 130F 20 PATENTEUuuv 8I973 31770 7 SHEET 1m 20 FIG I6 PAIENTEDmv 5 I975 3,770,

sum 15 or 20 III-IM- PATENTED UV 6 I973 SHEET IBM 20 ON 0E PATENIEUNuv 6 I973 SHEET 19UF 20 FIG 2|

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3148316 *Jan 24, 1962Sep 8, 1964Westinghouse Electric CorpContouring control apparatus
US3416056 *Aug 18, 1967Dec 10, 1968Fujitsu LtdProgrammed digital motor control for a machine tool using a pulse distribution technique
US3423656 *Dec 6, 1963Jan 21, 1969Inductosyn CorpSpline interpolator with interpolating potentiometers
US3500150 *Oct 24, 1965Mar 10, 1970Inductosyn CorpTool radius offset control for a closed loop multiaxes numerical control system
US3555253 *Feb 20, 1967Jan 12, 1971Hitachi LtdNumerical control system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3846761 *Jun 21, 1973Nov 5, 1974Fujikoshi KkPositioning controlling apparatus
US4025838 *Dec 26, 1974May 24, 1977Kawasaki Heavy Industries, Ltd.Signal modification device for memory controlled manipulator apparatus
US4035706 *Mar 27, 1975Jul 12, 1977Hymie CutlerOffset path generating system particularly useful for numerical control machines
US4041466 *Jan 19, 1976Aug 9, 1977Dynamics Research CorporationMulti-axis encoder processing and display system
US4056850 *Jan 19, 1976Nov 1, 1977Dynamics Research CorporationAbsolute relative position encoder processor and display
US4070608 *Dec 22, 1975Jan 24, 1978The Superior Electric CompanyTwo axes NC system with tool offset
US4140953 *Mar 3, 1976Feb 20, 1979Unimation, Inc.Real time program modification apparatus
US4163184 *Oct 4, 1974Jul 31, 1979The Superior Electric CompanyArcuate movement numerical control method and system
US4243924 *Jun 16, 1978Jan 6, 1981Oki Electric Industry Co., Ltd.System for interpolating an arc for a numerical control system
US4403281 *Apr 3, 1981Sep 6, 1983Cincinnati Milacron Industries, Inc.Apparatus for dynamically controlling the tool centerpoint of a robot arm off a predetermined path
US4581893 *Apr 19, 1982Apr 15, 1986Unimation, Inc.Manipulator apparatus with energy efficient control
US4659265 *May 27, 1982Apr 21, 1987Fanuc LtdTool radius compensation method for numerically controlled apparatus
USRE31208 *Apr 26, 1979Apr 12, 1983Unimation, Inc.Signal modification device for memory controlled manipulator apparatus
U.S. Classification700/186, 318/572, 318/573
International ClassificationG05B19/4103
Cooperative ClassificationG05B2219/50334, G05B2219/33099, G05B2219/50336, G05B2219/50289, G05B2219/34098, G05B2219/50313, G05B19/4103
European ClassificationG05B19/4103